Secondary electric clock



G. E. BARSGHIG.

SECONDARY ELECTRIC CLOCK.

(No Model.)

Patnted Sept. 2, 1884.

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UNTTED STATES CHARLES E. ,BABSOHIG, OF ST. LOUIS, MISSOURI.

TENT omen SECONDARY ELECTRIC CLOCK.

SPECIFICATION forming part of Letters Patent No. 3044595, dated September Application filed March 20,1884.

To all whom it may concern:

Be it known thatI, CHARLES E. BARSCHIG,

' a citizen of the United States, residing at St.

ings, in which Figure 1 represents a rear view showing the parts in position when the electro magnet is not vitalized. Fig. 2 is a similar view showing the parts in position when the electromagnet is vit-c lized. Fig. 3 is a side view looking in the direction of arrow 1, Fig. 1.

Similar letters indicate corresponding parts.

In the drawings, the letter A designates the frame, which forms the bearings for the center arbor, c, of a secondary electric clock. This arbor carries the minute-hand, or it is geared together with the minute-hand arbor, and on it is mounted a cog-wheel, b, which is exposed to the action of the propelling-pawl c and of the stoppawl d. The stop-pawl swings loosely upon a pin, 0, and it drops in gear with cog-wheel b by its own gravity, but its point is beveled off on its face looking toward the propelling-pawl b is turned in the direction of the arrow marked on it in Fig. 1 the stop-pawl is raised, but said stop-pawl prevents the cog-wheel from being turned in the direction opposite to said arrow. The propelling-pawl c swings on a pivot, f, which is secured in a lever B, and said pawl engages with the teeth of the cogwheel I) by its own gravity. The lever B has its fulcrum on apivot, g, secured in the frame A, and to its bottom end is firmly secured an arm, 0, which carries a weight, D. From the inner edge of the lever B projects a lip, h, over the end of the armature E of an electro magnet, F. The armature swings on a pivot, z, secured in the frame A, and the electromagnet F is firmly fastened to the frame A by an suitable means. By the action of the weightD the lever B is thrown into the position 0, so that when the cog-wheel (No model.

shown in Fig. 1; but when the electro-magnet is vitalized, the armature E is attracted so that it acts on the lip h, and thereby the lever B is thrown back to the position shown in Fig. 2. This backward motion of the lever is limited by stop j, which is adjusted to correspond to the distance between the successive teeth of the cog-wheel b, so that whenever the lever B swings back the propelling-pawl moves back very little more than sufficient to engage with a fresh tooth of the cog-wheel, and when the lever B is thrown forward by the weight D, the cog-rheel b is propelled exactly one tooth, said cog-wheel being locked for a short period by the stop-pawl d, as will be presently explained. When the propelling-pawl is in its forward position, tip catches beneath a locking device, 76, secured in the frame A, so that said pawl is held in gear with the cog-wheel b and retains the same firmly in-position, preventing it from being turned in either direction. The pawl 0 therefore has the double function of propelling the cog-wheel b and of locking the same in position after it has been propelled.

On the upper end of the lever B is secured an arm, I, which carries a nose, m, and when the lever, together with the propelling-pawl c, has been thrown back to the position shown in Fig. 2, whereby come free to be turned in the direction of the arrow marked on it, the nose m has been brought in a position over the stop-pawl d so that this pawl cannot be raised, and that it acts as a locking-pawl, preventing the cogwheel b from being turned in either direction until the lever B beginsto move forward. The nose'm is so adjusted that it relieves the pawl d immediately when theleverB begins to move forward, sov that it does not interfere with the action of the propelling-pawl c, which action does not begin before the stop-pawl has been released.

In place of the nose on, any other suitable locking device may be substituted.

In the example shown in the drawings, the

locking device 7c is made in the form of a pinion which is in gear with the cog-wheel b, and which,whenever the cog-wheel is propelled one tooth, turns on its arbor and closes down upon Fig. 1, its.

the cog-wheel I) would be the propelling-pawl. This device is absolutely sure in its actilm; but, if desired, a simple pin may be substituted 1'01 it.

From this t'leseription it will be seen that the cog-wheel b is always kept under the control of the two pawls c and (Z, and that the same cannot be moved except by the action of the propelling-pawl.

The electromagnet l! is in an electric circuit controlled by the primary clock in a nianner well known to those skilled in the art, so that the propelling-pawlciniparts to the minute-hand ol" the secondary clock the required step-by-step movement.

hat I claim as new, by Letters Patent, is-

l. The combination,substantiall before described,with the cogwheel b, of the lever B, the propelling-pawl c, pivoted to this lever, the weighted arm 0 and lip 71, the armature E, the electromagnet F, and a lockiug device for locking the propel]ing-pawl and the cog-wheel in their position of rest.

2. Thecombination,substantially as hereinbefore described, with the cogwheel I), of the stop-pawl (Z, the lever 13, the propelling-pmvl c, pivoted to this lever, the weighted arm 0 and lip h, the armature E, the electro-mag'net F, and a locking device for locking the pro polling-pawl and the cog-wheel in their position of rest.

and desire to secure y as herein- 3. The combination,substantially as hereinbefore described,with the cog-wheel I), of the stop-pawl (Z, the lever B, the locking device m, carried by said lever, the propelling-pawl c, pivoted to this lever, the weighted arm 0 and lip 71-, the armature It], the clectroanagnct 1*, I and a locking device for locking the propel.- ling-pawl and the cogwvheel in their position i of rest. 4. The combination,substantiallyasherein- J before described, with the cog-wl1eel I), of the l stop-pawl (Z, the lover I the locking device I m, carried by said lever, the stop thepro iel- I ling-pawl c, pivoted to the lever, the weighted l arm 0 and lip 71 the arniatru'e l the electro magnet F, and a locking I the propelling-pawl and 1 position of rest. 5. The combination, inbelbre described, with the cog-wheel and the pawl which serves to propel this cog-- 1 wheel, ol'a pinion which gears into the cog l wheel and closes down upon the propelling- I pawl alter each movement ot' the cog-wheel.

device for locking the cog-wheel in their In testimony whereof I have hereunto set my hand and seal in the presence of two sub scribingwitnesses.

CHAS. E. BrtliSC/llltl. [rt s.] -Witnesses:

W. HAUFF,

E. F. Kiis'rioivnUnnn.

substantially as here armth 

